GoKawiilTektronix TDS7104 scope revived after CMOS battery failure
A hobbyist purchased a Tektronix TDS7104, a 1 GHz, 4-channel oscilloscope from the early 2000s, at a Silicon Valley flea market for $300 after negotiating down from $700. The unit initially powered on and ran fine, but hours later it failed to boot properly, throwing a CMOS battery error at the BIOS screen. The author documents the process of diagnosing and repairing the aging instrument to restore full functionality.